Table 2 Characteristic frequencies, duration and waveform descriptions for the three types of events detected by the seismometer array over a 49-day period.
From: Drift-dependent changes in iceberg size-frequency distributions
Signal type | Description of signal onset | Description of signal coda | Characteristic frequency (Hz) | Typical duration (s) | Number detected | Process interpretation |
|---|---|---|---|---|---|---|
1 | Impulsive | Abrupt termination | 30–40 | 1 | 1979 | Microfracturing |
2 | Impulsive | Abrupt termination | 10–30 | 1–5 | 3271 | Tensile fracturing and crack enlargement |
3 | Emergent; amplitude increases over time | Gradual decline in amplitude | 1–10 | 3–15 | 1592 | Iceberg calving, capsize and rolling |
